Window frame extrusion



FIG. 1 is a perspective view of a window extrusion showing our new design;

FIG. 2 is a perspective view thereof showing one end and other side;

FIG. 3 is a perspective view of a modified form thereof; and,

FIG. 4 is a perspective view of FIG. 3 showing one end and other side. 

The ornamental design for window frame extrusion, as shown and described. 